1003316561 has 8 divisors (see below), whose sum is σ = 1081088064. Its totient is φ = 925629840.

The previous prime is 1003316543. The next prime is 1003316569. The reversal of 1003316561 is 1656133001.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1003316561 - 2⁶ = 1003316497 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1003316561.

It is not an unprimeable number, because it can be changed into a prime (1003316569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4556 + ... + 45026.

It is an arithmetic number, because the mean of its divisors is an integer number (135136008).

Almost surely, 2^1003316561 is an apocalyptic number.

It is an amenable number.

1003316561 is a deficient number, since it is larger than the sum of its proper divisors (77771503).

1003316561 is a wasteful number, since it uses less digits than its factorization.

1003316561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42391.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 1003316561 is about 31675.1726277853. The cubic root of 1003316561 is about 1001.1043004051.

Adding to 1003316561 its reverse (1656133001), we get a palindrome (2659449562).

The spelling of 1003316561 in words is "one billion, three million, three hundred sixteen thousand, five hundred sixty-one".